let all = [
    { userId: 1, pwd: 'QAQ1' },
    { userId: 2, pwd: 'QAQ2' },
    { userId: 3, pwd: 'QAQ3' },
    { userId: 4, pwd: 'QAQ4' },
    { userId: 5, pwd: 'QAQ5' },
    { userId: 6, pwd: 'QAQ6' },
    {}
]


for (let i = 0; i < all.length; i++) {
    console.log('账号')
    console.log(all[i].userId)
    console.log('密码')
    console.log(all[i].pwd)

    console.log(`test ${all}`)
    console.log(all)
    console.log("   ")
}